Assuming control of the legendary Snake (a.k.a. Big Boss), players are charged with the infiltration of Camp Omega where both Paz and Chico are held. The hostages hold key information concerning Snake and his private military organisation that Snake and his ally Kaz Miller must prevent from being exposed. Ground Zeroes charts the rescue and the subsequent fallout that leads into the beginning of the The Phantom Pain. Ground Zeroes also acts as a bridge between previous Metal Gear Solid titles, easing players into the vaunted open world of Metal Gear Solid 5.

The first Metal Gear Solid title to offer open world gameplay. Ground Zeroes offers total freedom of play: how missions are undertaken is entirely down to the user.
Imagine classic Metal Gear gameplay but with no restrictions or boundaries. Players use intelligence and cerebral strategy to sneak their way through entire missions, or go in all guns blazing. Each will have different effects on game consequences and advancement.
Ground Zeroes boasts a central story mode and additional side-missions ranging from tactical action, aerial assaults and covert stages that will be sure to surprise.
Ground Zeroes users will benefit from a clean in-game HUD that shows the minimal amount of on-screen data to give a more intense gaming experience.
Ground Zeroes will test the player in a variety of time and weather environments that will be central to Metal Gear Solid V: The Phantom Pain. Use night conditions to your advantage, or poor weather as strategic cover.